JPH0317050B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a smoke prevention damper that exhausts or prevents smoke generated during a fire, or a fire prevention damper that prevents the spread of fire. The present invention relates to a switching device used in a damper device.

(Prior art) In recent years, as buildings have become larger and more complex, smoke dampers have been developed to prevent the spread of smoke generated by fires.
It is mandatory to install a damper device such as a smoke exhaust damper to exhaust smoke to the outside or a fire prevention damper to prevent the spread of fire. As an opening/closing device for such a damper device, there is one shown in FIGS. 1 and 2. FIG. 1 is an explanatory diagram illustrating a fire damper as an example of a damper device together with a switching device, where 1 is a fire damper, 2 is a switching device as an opening/closing mechanism, and 3 is a temperature fuse device. In the temperature fuse device 3, when the temperature rises due to a fire, the heat-sensitive plate 4 comes off due to the melting of the solder that adheres the heat-sensitive plate 4, and the shaft 6 is slid to the right by the spring force of the compression spring 5, which will be described later. Release the fuse lever 7. A rotating shaft 11 is provided approximately at the center of the fire damper 1, crossing a duct section 10 to which ducts are attached on both sides.
Open and close 0. Note that the blade 12 is shown in an open state. A rotating spring 13 is wound around the opening/closing device 2 in which the rotating shaft 11 is extended. Reference numeral 14 denotes a clutch mechanism section, which is equipped with a gear plate in which the rotating shaft 11 is mounted, one end of the rotating spring 13 is fixed to the gear plate, and the blade 12 is rotated to the closed position by the return force of the rotating spring 13. We are encouraging them to do so. A lever 15 for manual operation is provided on the left side of the clutch mechanism section 14, and is connected to the rotating shaft 11 via a gear plate. 8 is a wire for manual operation.

FIG. 2 is an explanatory diagram showing the clutch mechanism section 14 of FIG. 1 taken out. 26 is a gear plate, and a gear 17 that meshes with the gear plate 26 is attached to the slide plate 18. The slide plate 18 is
The gear 17 is pressed by the elastic force of the pair of springs 19 to mesh with the gear plate 26, and the gear plate 26 is held in a biased state. When the temperature fuse device 3 thermally operates due to a rise in temperature and the shaft 6 slides, the fuse lever 7 is unlocked, and the fuse lever 7 is rotated by the spring force caused by the contraction of the strong spring 21.
The fuse lever 7 engages a manual lever 22, and the manual lever 22 also rotates in conjunction with the operation of the fuse lever 7, and resists the pair of springs 19 by the pressure of a convex portion 23 formed on the manual lever 22. to slide the slide plate 18. By sliding the slide plate 18, the gear 17 and the gear plate 26 are disengaged,
The gear plate 26 is rotated by the return repulsive force of the rotary spring 13 shown in FIG. 1, and rotates the blade 12 to the closed position via the rotating shaft 11 that is pivoted to the gear plate 26.

However, in such an opening/closing device for a damper device, the rotation spring 13 biases the gear plate 26 by its return repulsive force so as to instantaneously rotate the blade 12 to the closed position. A pressing force is applied to this gear plate 26 using a pair of springs 19 having a very strong elastic force, and the elastic force of the pair of springs 19 is used to resist the return repulsive force of the rotation spring 13. The gear plate 26 is held in a biased state. For this reason, if the pair of springs 19 deteriorate due to aging or the like and their elastic force decreases, the holding force against the gear plate 26 in the biased state may be impaired, and there is a risk that the gear plate 26 may rotate. Ta.

Furthermore, since the slide plate 18 is slid against the elastic force of the pair of springs 19 when the damper device is operated, the spring 21 is a spring member having a stronger elastic force than the pair of springs 19. was used, and if the spring 21 deteriorated and the elastic force decreased, there was a risk that the damper device would not operate reliably.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and allows the gear plate, which is biased by the return force of the rotating spring, to be moved without using the strong elastic force of the spring member. It is an object of the present invention to provide an opening/closing device for a damper device that can reliably lock and release locking with a minute force.

(Structure of the Invention) In order to achieve this object, the present invention is structured as follows. In addition, the reference numerals in the drawings of the embodiments are also shown.

First, the present invention provides a duct portion 10 of a damper device 1.
A rotating shaft 1 extending from an opening/closing mechanism section 2 that opens and closes the interior.
A gear plate 26 is pivotally attached to the gear plate 26, and a rotating spring 13 is wound around the gear plate 26 and biased. When the gear member 27 is engaged with and released from the gear plate 26, the opening/closing mechanism is opened by the return repulsive force of the rotating spring 13. The target is the opening/closing device of a damper device that operates 2.

In the present invention, as an opening/closing device for such a damper device, a gear member 2 that meshes with a gear plate 26 is used.
7 and the gear mechanism section 10
The rotating shaft 2 of the gear mechanism section 100 with the
a swinging mechanism section 33 that swings at a different position from 8 as a fulcrum 34;
By bending the toggle link due to the release operation, the swinging mechanism section 33 swings around the fulcrum 34, and the gear mechanism section 10
The present invention is characterized in that it is provided with a lever mechanism section 38 for releasing the engagement between the gear member 27 of 0 and the gear plate 26.

(Example) The implementation order of the present invention will be explained below based on the drawings.

FIG. 3 is a perspective view showing an embodiment of the opening/closing device of the present invention used in the fire damper of FIG. 1. First, to explain the configuration, 25 is a frame body,
A gear plate 26 is provided inside the frame 25. The gear plate 26 has a rotary shaft 11 extending from the opening/closing mechanism of the fire damper 1 shown in the conventional example shown in FIG.
is biased to rotate to the closed position. 27
is a gear that meshes with the gear plate 26, and a gear 29 is attached via a shaft 28. The shaft 28 is rotatably attached to the mounting base 30. 31 is gear 29
It is a worm that engages with the motor 32 for return.
It is fixed to a shaft that extends further, and transmits the driving force of the motor 32 to the gear 29. Motor 32, worm 31, and gears 27, 2 fixed to mounting base 30
9 forms a gear mechanism section 100. Reference numeral 33 denotes a swinging mechanism section, and the frame body 25 that guides the swinging mechanism section 33 is provided with an opening 24 larger than the shaft 28 at a position corresponding to the shaft 28, and the gear mechanism section 100
is installed in the swinging mechanism section 33 as shown in the figure, and swings about the shaft 34 as a fulcrum. To install the gear mechanism section 100 on the swing mechanism section 33, the mounting base 30 is fixed to the swing mechanism section 33 with screws 35 in a movable state, and the mounting base 30 is fixed to the swing mechanism section 33 by pressing a strong spring 36.
This is done by bringing the stopper 37 of the swing mechanism section 33 into contact with the stopper 37. Reference numeral 38 denotes a lever mechanism section, in which a lever 39 and a lever 40 form a toggle link. The lever 39 swings about a shaft 41 provided approximately in the center as a fulcrum, and is connected to one end of a lever 40 via a shaft 42. The lever mechanism section 38 bends and stretches using the shaft 42 as a bending and stretching axis. The other end of the lever 40 is the shaft 4
3 is connected to one end of the swinging mechanism section 33, and the swinging mechanism section 33 is swung by the bending and stretching motion of the lever mechanism section 38. A spring 44 is wound around the shaft 41 and biases the shaft 42 of the lever mechanism 38 in the direction of a stopper 45 fixed to the frame 25. When the shaft 41 comes into contact with the stopper 45, the shafts 41, 42, 43 position on a straight line. Reference numeral 46 denotes a manually operated lever that is biased to rotate clockwise by a spring 53 wound around the shaft 48. By pulling the wire 47, the lever rotates counterclockwise about the shaft 48, and by pushing the lever 39. The shaft 42 of the lever mechanism section 38 is bent in the opposite direction to the stopper 45. Reference numeral 49 denotes a sliding lever, which is slidably attached to the frame 25 and biased to slide leftward by the contraction of a spring 50. When the temperature fuse device 3 thermally operates and the shaft 6 slides downward, the shaft 6 is disengaged from the pawl 51 provided on the slide lever 49, and the slide lever 49 slides to the left. As the slide lever 49 slides, the claw 52 comes into contact with the lever 39 and pushes it in, bending the lever mechanism 38 in the direction away from the stopper 45.

Next, the normal holding operation will be explained. As shown in FIG. 3, under normal conditions, the lever mechanism section 38 is expanded by the repulsive force of the spring 44, and the shafts 41, 42, and 43 are positioned on a straight line. This state is shown in FIG. 4 as a plan view with some parts omitted. Due to the depth of the lever mechanism section 38, the swing mechanism section 33 is connected to the gear 27 and the gear plate 26.
They are positioned so that they mesh with each other. The gear plate 26 is given a rotational force by the return repulsive force of the rotation spring 13, and transmits the rotational force of the gear plate 26 to the gear 27. However, the motor 32 normally stops its operation and keeps the worm 31 stationary, and since the gear 27 is stationary via the gear 29 connected to the worm 31, the gear 27 is moved by the rotational force of the gear plate 26. Push it in. The swing mechanism section 33 is centered around the shaft 34 when the gear 27 is pushed in, and reduces the rotational force of the gear plate 26 based on the lever principle, and transmits it to the lever mechanism section 38 via the shaft 43. Since the shafts 43, 42, and 41 are located on a straight line, the lever mechanism section 38 transfers the pressing force from the swing mechanism section 33 to the shaft 4.
1 to hold the gear plate 26 in a biased state.

Next, the closing operation of the damper by manual operation or thermal activation of the temperature fuse device will be explained. Shaft 43, either for manual operation by pulling the wire 47 or for thermosensitive operation of the temperature fuse device 3;
42 and 41 are unbalanced on the straight line, the lever mechanism section 38 consisting of a toggle link is bent into a dogleg shape. This state is shown in plan in FIG. Incidentally, FIG. 5 shows a state in which manual operation of the wire 47 and thermal operation of the temperature fuse device 3 are performed simultaneously. By bending the lever mechanism section 38, the swing mechanism section 33 is pulled using the shaft 43. The swing mechanism section 33 rotates counterclockwise about the shaft 34 to release the gear plate 26 and gear 27 from engagement. The gear plate 26 is rotated by the return repulsion force of the wound rotation spring 13, rotates the blade 12, and rotates the duct 10.
will be closed. The gear mechanism section 100 provided on the swing mechanism section 33 has a mounting base 30 that is rotatable around a screw 35, and normally a strong spring 36 is used to close the stopper 37 on the swing mechanism section 33 side. However, this structure is provided so that the damper can be closed even when the motor 32 is driven.

That is, in the state shown in FIG. 3, when a force is applied to rotate the gear 29 counterclockwise by driving the worm 31 by the motor 32, the shaft 28 to which the gear 29 is fixed engages the gear plate 26 via the lower gear 27. Since the gear plate 26 does not move, the user ends up trying to turn the mounting base 30 to the left around the screw 35. When the force trying to turn the mounting base 30 to the left exceeds the force of the spring 36, the mounting base 30 and the shaft 2 rotate around the screw 35.
8. The gears 27 and 29 move counterclockwise as a unit, and the swing mechanism 33 allows this movement within a certain range.
is provided with an opening 24 shown in broken lines. As a result, the gear 27 is separated from the gear plate 26 against the spring 36 by driving the gear 29 by the motor 32, and the damper can be operated to close.

(Effects of the Invention) As described above, according to the present invention, a gear plate is attached to a rotating shaft extending from an opening/closing mechanism that opens and closes the inside of a duct of a damper device, and a rotating spring is wound around the gear plate. In the opening/closing device of a damper device, the opening/closing mechanism is operated by the return repulsive force of a rotating spring when the gear member is engaged with and disengages from the gear plate after being biased, and the gear mechanism includes a gear member that engages with the gear plate; A swinging mechanism that swings around a position different from the rotation axis of the gear mechanism when the gear mechanism is installed, and a swinging mechanism that is connected to one end of the swinging mechanism and swings by bending a toggle link when a release operation is performed. A lever mechanism part is provided that swings the moving mechanism part around a fulcrum to disengage the gear member of the gear mechanism part and the gear plate, and the swing mechanism part absorbs the return repulsive force of the rotating spring caught in the gear plate. By reducing the stress and absorbing it by the lever mechanism, the biased gear plate can be reliably locked with a minute force.

Additionally, when operating the damper, the extending lever mechanism is bent with a small amount of force to release the engagement between the gear mechanism and the gear plate, allowing the damper to operate easily and reliably. This has the effect of being able to do this.

In addition, although the case where the switchgear of the present invention is used as a fire prevention damper has been explained above, other damper devices, such as a smoke exhaust damper that exhausts smoke generated during a fire, or a smoke damper that exhausts smoke generated during a fire, has been explained as an example. The present invention can be applied to an appropriate damper device such as a smoke-proof damper that prevents smoke.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the usage state of a conventional release device together with a damper device, FIG. 2 is an explanatory diagram showing the clutch mechanism section of FIG. FIG. 4 is a perspective view showing one embodiment, FIG. 4 is a plan view of the main part of the state shown in FIG. 3 with some parts omitted, and FIG. 5 is a plan view of the main part showing the closing operation of the damper. 1...Fire damper, 2...Switching device (opening/closing mechanism part), 3...Temperature fuse device, 4 Heat sensitive plate, 5,
19, 21, 36, 44, 50... Spring, 6...
Shaft, 7...Temperature fuse lever, 8,47
...Wire, 10...Duct part, 11...Rotating shaft, 12...Blade, 13...Rotating spring, 16,2
6... Gear plate, 25... Frame body, 27, 29... Gear, 28, 34, 41, 42, 43, 48...
Axis, 30...Mounting base, 32...Motor, 31...
Worm, 33... Rocking mechanism section, 35... Screw,
37, 45... Stopper, 38... Lever mechanism section, 39, 40, 46... Lever, 49... Sliding lever, 51, 52... Pawl, 100... Gear mechanism section.

Claims (1)

[Claims] 1. A gear plate 2 is attached to a rotating shaft 11 extending from an opening/closing mechanism section 2 that opens and closes the inside of the duct section 10 of the damper device 1.
6 is attached to the shaft, and the rotation spring 13 is wound around the gear plate 26 and biased, and when the gear member 27 is engaged with and released from the gear plate 26, the rotation spring 13 is
In the opening/closing device of a damper device that operates the opening/closing mechanism section 2 by the return repulsive force of
The rotating shaft 28 of the gear mechanism section 100 is
a swing mechanism section 33 that swings at a different position from the fulcrum 34; and a swing mechanism section 33 that is connected to one end of the swing mechanism section 33;
A lever mechanism section 38 is provided which swings the swing mechanism section 33 about the fulcrum 34 by bending the toggle link due to a release operation and releases the engagement between the gear member 27 of the gear mechanism section 100 and the gear plate 26. An opening/closing device for a damper device characterized by: